VulnerabilityDeferred

CVE-2026-54288

This vulnerability is fixed in 4.12.25.

MEDIUM 6.5EPSS 0.15%

Does this matter?

Lower severity and a low EPSS score (0.15%). Track it; it rarely justifies an emergency change on its own.

Description

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.25, the Body Limit Middleware trusts the request's Content-Length header to decide whether a body is within the limit. On AWS Lambda (API Gateway v1/v2, ALB, VPC Lattice, and Lambda@Edge) the body is delivered fully buffered and the adapter builds the request with the client-declared Content-Length, which need not match the actual payload. A client can declare a tiny Content-Length while sending a much larger body, slipping past the limit. This vulnerability is fixed in 4.12.25.

CVSS 3.1: 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
EPSS: 0.15% probability · 4th percentile
CISA KEV: Not listed
Weakness: CWE-345
Source: security-advisories@github.com

References

https://github.com/honojs/hono/security/advisories/GHSA-rv63-4mwf-qqc2

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.